Home / 138,979.44-191,693.88-85,290.48

Finding the Fourth Proportional to 138,979.44, 191,693.88 and 85,290.48

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Solution

The fourth proportional to 138,979.44, 191,693.88 and 85,290.48 is: 117,640.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,979.44 : 191,693.88 = 85,290.48 : x
  2. Step 2: Convert to fraction form
    138,979.44/191,693.88 = 85,290.48/x
  3. Step 3: Cross multiply
    138,979.44x = 191,693.88 × 85,290.48
  4. Step 4: Simplify right side
    138,979.44x = 16,349,663,038.26
  5. Step 5: Solve for x
    x = 16,349,663,038.26/138,979.44
  6. Step 6: Final answer
    x = 117,640.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.